FeatureToggles: Add context and and an explicit global check (#78081)

pkg/services/featuremgmt/models.go

@@ -2,11 +2,21 @@ package featuremgmt
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 )
 
 type FeatureToggles interface {
-	IsEnabled(flag string) bool
+	// Check if a feature is enabled for a given context.
+	// The settings may be per user, tenant, or globally set in the cloud
+	IsEnabled(ctx context.Context, flag string) bool
+
+	// Check if a flag is configured globally.  For now, this is the same
+	// as the function above, however it will move to only checking flags that
+	// are configured by the operator and shared across all tenants.
+	// Use of global feature flags should be limited and careful as they require
+	// a full server restart for a change to take place.
+	IsEnabledGlobally(flag string) bool
 }
 
 // FeatureFlagStage indicates the quality level